Self-contained lung-power breathing device



Dec. 8, 1925- A. B. DRAGER SELF CONTAINED LUNG POWER BREATHING DEVICE 2 Sheets-Sheet 1 Filed Aug. 30, 1925 Dec. 8, 1925. 1,564,835 v A. B. DRAGER SELF CONTAINED LUNG POWER BREATHING DEVICE Filgd Aug. 30, 1923 2 Sheets-Sheet 2 Patented Dec. 8, 1925.

UNITED STATES ALEXANDERBEBNHABD DBKGEB, OF II'JIIIIBIMK, GERMANY.

SELF-CONTAINED LUNG-POWER BREATHING DEVICE.

Application filed August 30, 1928. Serial No. 680,250.

To all whom it may concern:

"Be it known that I, ALEXANDER BERN- HARD DRKGER, a German c1t1zen, residmg at Lubeck, Germany, have invented certain 'new and useful Improvements in Self-Contained Lung-Power Breathing Devices, of which the following is aspecification. This invention relates to self-contained lung-powerbreathing-devices and has for its of, example constructional embodiments of may object; an improvement of the device described and claimed in my prior application Ser. No. 601,030 filed Nov.- 15th, 1922, and in which a certain amount of the oxygen serving-to revivify the air to be breathed is continually supplied to the air circuit of the device by means of a pressure reducing valve whilst a periodic supply of oxygen according to the breathing requirements, is

. passed through a self-closing stopvalve operated'by a lever mechanism controlled by breathing, into the air circuit of the device as additional oxygen.

he present invention is characterized by the fact that the self-closing stop valve and its operating mechanism is,without any separate or auxiliary bag, casing or the like, laced in the breathing bag itself and this atter may be fitted with an air release valve which, in co-operation with a stationary stop, allows when necessary surplus or excess .air together with any nitrogen that have accumulated to escape into the atmosphere.

The accompanying drawings illustrate, more or less diagrammatically and by way the invention.

In the drawings a Figure 1 is a rear elevation otthe device.

F-i ure 2 is a vertical section taken on the 'B of Figure '1. Figure 3 is a horizontal section taken on ling C D of- Figure 1 and drawn to a larger sea e. r I

Figure 4'is a section, through the-air-release valve, and

Figure 5 is a sectional elevation of the selfclosing stop valve drawn to a still larger scale. 1

Figures 6 and 7 show in elevation and sectional planrespectively a, breathing bag with amodified form of the self-closing stop valve mechanism these figures being'drawn" v flation the said valve will be opened in the to a larger scale than'Figures 1 to 3.

- The arrangement'o'f the breathing device as such is already known and need no further explanation. 3

Referring to Figures 1 to 5, the breathing bag 8 is arranged upon the supporting plate It between the ,ai'r'purifying' cartridge 1? and the oxygen container 7, and passes in the example shown in the, form of an extension 8 under the cartridge 7) (Figure 2). The purified air coming from the cartridge p enters the breathing bag 8 through the inlet (l,

and is inhaled therefrom through the outlet e and the conduit 6. On 'usingjthe apparatus after opening the stop valve 7 of the container 7, and adjusting the pressure reducing valve 9, a certain quantity of oxygen per unit of time flows steadily through the conduit a into the breathing bag 3. If, a shortage or want of air occurs in the air circuit system or in the breathing bag 8, 8 then this latter collapses to a' corresponding extent. Located within the bag are levers t,v 1' which are adapted to be engaged by the. walls of the bag when the latter collapses and by their co-operative action on the valve rod m open the oxygen self-closing stop-valve y (Figures 3 and 5), so that additional oxygen can flow, in a quantity corresponding to the breathing requirements, out of the supply pipe c into the breathing bag. When the breathing re uirements havebeen satis fied then the va ve y closes automatically due to the pressure of its spring .2 and of the oxygen in the pipe 0. This closing movement ofthe valve y returns the levers to their open or inoperative position (Figure 3).

The a1r release valve built into the-walls of against its spring to then the valve plate w is lifted off its seating and any excess of breathing air can be allowed to escape from the breathing bag into the atmosphere. In order to render the air release valve independentof operation by the person carrying the device, the carrying plate It may, advantageously, be provided with a stop or abutment in the form of a fixed arm 11, (Figures 1 and 2), against which the press button to will strike as soon as the breathing bag is sufliciently inflated, so that upon further insame way as when the press button is pushed inwards by hand. After the escape of the excess air as a result of this movement the breathing bag'again collapses and moves the valve and the press button away from the arm to again. The valve plate a then automatically closes the orifices '0 under the pressure ofthespring 7 In order to prevent the entrance of air from the atmosphere into the interior of the breathing bag through the openings '0 during the operation of the valve as aforesaid, the valve casing v is provided with a sensitive return valve which preferably consists of a valve plate n influenced by a spring M. This valveplate, allows any excess of air to pass freely out of the breathing bag but closes when the valve plate w is opened, and as soon as the pressure of air within the breathing bag becomes less than that of the atmosphere. 7

Instead of connecting the supply pipe 6 to the low pressure chamberofthe reducing valve 9 said pipe may be connected to the oxygen high pressure pipes leading to the reduction valve 9. Under certain conditions it would suflice to provide only one lever such as r or .t in the breathing bag.

Referring nowto Figures 6 and 7 of the drawings, the modifi'ed form of the invention is characterized in that the oxygen selfclosing stop valve mechanism is in the form of a self-contained unit which is inserted in the breathing bag through an opening in'a mounting provided in the wall of the breathing bag, said mounting alsoserving as a coupling' member for the oxygen pipe, and which is held fast by the union of the oxygen pipe with the mounting. Asa result of this arrangement the valve unit can be easily, inserted into and removed from the breath "ing bag without its being necessary to tear or otherwise open the bag a method which impairs the impermeability of the bag and moreover is inconvenient and entails a loss of time.

Accordingly the breathing bag 8 having an air inlet d and an air outlet 6 is provided with an opening in which a mountingz' is located which latter has a screwed extension,

7:: to which the pipe 0, communicating witha source of oxygen (high or low pressure) may be attached by means of a nut m.

The valve unit consists'of a length of pipe 0, provided with an inner and an outer collar, and an extension 0 which'may be obtainedby cutting away the'wall of a piece of pipe for a portion of its length. The pipe 0 forms a valve box or casing for the accommodation of a valve 1, normally closed by means of a spring 2, said valve engaging the inner collar which is fashioned as a valve seating. A lver q is pivotally mounted on the pipeo at 0 and provided at its free end with a roller 9 this lever serving to open the valve The valve unit is inserted, by passing the valve lever g, from the outside through the opening in the mounting i into the breathing bag in the manner shown in Figure 7. The securing and packing of the valve unit between an inner flange of the mounting i and a terminal flange of the oxygen supply pipe 0 is effected through the medium of the nut m and suitable packing rings as clearly shown in Figure 7.

f the breathingbag collapses, owing to a fall in the quantity of air or to a lack of air therein, its Walls press against the roller 9 thereby operating the lever g and opening the valve 11 so as to allow oxygen to enter the breathing bag from the, "feed pipe 0. The breathing bag, thereupon becomes inflated and, moves away from'the'lever 9, so

that the self-closing stop valve y closes au- 1 tom atically.

In order to prevent wear ofthe wall of the bag as a result of the repeated contact by the roller and in order to render the action of the bag upon the lever 9 more reliable, the bag is preferably provided at this point with a rigid lining plate 8 The op posit-e wall of the bag may be covered With rigid strips 3 running transversely to the closing stop valve mounted directly in said breathing bag, controlling mechanism mounted directly in said breathing bag for controlling said stop valve, an air release valve carried by said bag for permitting the escape of surplus air from said breathing bag and a stationary stop on said device located in the path of said release valve with which the latter is brought into engagement as the inflation of the breathing bag exceeds a predetermined degree and the air release valve is thereby automatically opened to relieve said excess inflation.

2. In a self-contained lung-power breathing deviceof the kind described, the combination ofa breathing bag, an'oxygen selfclosing stop valvefmounted directly in said breathinghag, controlling mechanism mounted'direetlyin said breathing bag for control ling said stop valve, a casing connected with said breathing bag and provlded with outlets for permitting the escape of surplus air from the breathing bag, a disk in said, casing adapted to control said outlets, a press-button connected with said disk, a spring for normally maintaining said disk in its closed as the inflation of the breathing bag exceeds a predetermined oint whereby'said disk is automatically ad usted to an open position ioa'elieve said excess inflation.

3. In a self-contained 1ungpo'wer breathing device of the kind described, the combi nation of a breathing bag, an oxygen selfclosing stop valve mounted directly in said breathing bag, controlling mechanism mounted directly in said breathing bag for controlling said stop valve, a casing connected with said breathing bag and provided with outlets for permitting the escape of surplus air from the breathing bag, a disk'in said casing adapted to control said outlets, a press-button connected with said 'disk, a, apring for normally maintaining said disk in its closed position, a stationarystop on said =levioe arranged to be engaged by the pressbutton as the inflation of the breathing bag exceeds av predetermined point whereby said disk is automatically adjusted to an open posltiOD to relieve said excess inflation, and a return valve in said casing operating independently of said disk to allow the escape of surplus air from the breathing bag and to prevent the entrance of air from the atmosphere.

4. In a self-contained lung-power breath-. ing'device of the kind described, the combination of a breathing bag having an opening, an apertured mounting fixed in said opening, self-closing stop-valve mechanism comprising a self-contained unit arranged to be removably inserted in the aperture of said ALEXANDER BERNHARD DRAGER.

mounting and constituting a coupling member for an oxygen supply pipe, a union nut for securing said stop-valve mechanism and said oxygensupply pipe in said mounting, an air release valve carried by'said bag for permitting the escape of surplus air: from said breathing bag and a stationarysto on said device located in the path of sai release valve withwhich the latter is brought into engagement as the inflation of the breathing bag exceeds a predetermined degree and the air release valve is thereby automatically opened to relieve said excess inflation.

5. In a' 'self-contained lung-power breathing device of the kind described, the combination of a breathing bag, an ox gen self-closing stop valve mounted direct y in said breathing bag, controlling mechanism mounted directly in said breathing bag for controlling saidstop valve, rigid pressure members fitted upon the walls of said breathing bag for engagement with said controlling mechanism in the operation thereof, an air release valve carried by saidbag for permitting the escape of surplus air from said breathing ba and a stationary stop on said device located in the path of said release valve with which the latter isbrought into engagement'as the inflation of 1 the breathing bag exceeds "a predetermined degree and the air release valve is thereby automatically opened to relieve said excess inflation. 

